摘要:
A method for monitoring the pressure in a tire of a vehicle wheel, including measuring the wheel speed, to detect a loss of pressure using inexpensive components, and to produce a highly robust diagnosis due in particular to: calculating a first sum of the speeds of the left front wheel and right rear wheel and a second sum of the speeds of the right front wheel and left rear wheel, calculating a difference equal to the first sum minus the second sum, and comparing an absolute value of the difference with a threshold, such that an absolute value greater than the threshold denotes detection of a loss of pressure in one of the tires.
摘要:
A method determining a rate of recirculated exhaust gas (EGR rate) at an inlet of a cylinder of an internal combustion engine at a moment t, the exhaust gas being conveyed in a recirculation duct connecting an exhaust line of the engine to an intake line, and the EGR rate being equal to the ratio between flow rate of the recirculated gas and total gas flow rate in the intake line at a location of the intake line in question and at the moment in question. The method: a) determines at which moment t_intro preceding the moment t the gas, having arrived at the inlet of the cylinder at moment t, was fed into the intake line; b) determines the EGR rate at an outlet of the recirculation line to the intake line at the moment t_intro; and c) determines the EGR rate at the inlet to the cylinder at moment t based on the EGR rate at the outlet of the recirculation line to the intake line at moment t_intro, as determined in b).
摘要:
A device for controlling fuel injection in an internal combustion engine of an automobile, the internal combustion engine being connected at an inlet thereof to a fresh air intake pipe and at an outlet thereof to an exhaust gas discharge pipe including a catalytic converter, an exhaust gas partial recirculation circuit connecting the discharge pipe to the fresh air intake pipe. The device includes a mechanism determining the amount of unburned fuel in the exhaust gases, a mechanism determining the amount of fresh air taken into the internal combustion engine, and an electronic controller determining the amount of fuel to be injected depending on signals received of the determined amount of unburned fuel and the determined amount of fresh air taken in.
摘要:
A device for controlling fuel injection in an internal combustion engine of an automobile, the internal combustion engine being connected at an inlet thereof to a fresh air intake pipe and at an outlet thereof to an exhaust gas discharge pipe including a catalytic converter, an exhaust gas partial recirculation circuit connecting the discharge pipe to the fresh air intake pipe. The device includes a mechanism determining the amount of unburned fuel in the exhaust gases, a mechanism determining the amount of fresh air taken into the internal combustion engine, and an electronic controller determining the amount of fuel to be injected depending on signals received of the determined amount of unburned fuel and the determined amount of fresh air taken in.
摘要:
A method of diagnosis of a drift of at least one injector of an injection system with a common ramp, which includes a pressure regulating control unit and a richness regulating control unit, the pressure and richness regulating control units being driven by an electronic computer according to values of pressure setpoint and of richness setpoint which are recorded in the computer, the method of diagnosis including checking for existence of a drift of the pressure regulating control and checking for existence of a drift of the richness regulating control when the two units operate in closed loop, the drift of the injector being established upon the joint detection of a drift of the pressure regulating control unit and of a drift of the richness regulating control unit.
摘要:
A method determining a rate of recirculated exhaust gas (EGR rate) at an inlet of a cylinder of an internal combustion engine at a moment t, the exhaust gas being conveyed in a recirculation duct connecting an exhaust line of the engine to an intake line, and the EGR rate being equal to the ratio between flow rate of the recirculated gas and total gas flow rate in the intake line at a location of the intake line in question and at the moment in question. The method: a) determines at which moment t_intro preceding the moment t the gas, having arrived at the inlet of the cylinder at moment t, was fed into the intake line; b) determines the EGR rate at an outlet of the recirculation line to the intake line at the moment t_intro; and c) determines the EGR rate at the inlet to the cylinder at moment t based on the EGR rate at the outlet of the recirculation line to the intake line at moment t_intro, as determined in b).